Photo-Controlled Spatial Barcoding for Single-Cell Sequencing
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Solution Overview
Problem
Existing high-throughput single-cell sequencing methods fail to preserve spatial arrangement information of cells in their original biological context, leading to incomplete gene expression profiles in complex multi-cellular systems.
Innovation Solution
A method utilizing photo-controlled adapter sequences and nucleic acid tags to label or barcode molecules within cells, enabling high-throughput labeling that maintains spatial organization information by exposing specific regions to photonic energy to activate adapter sequences and couple them with nucleic acid tags.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-throughput single-cell sequencing methods are used, then gene expression characterization is improved, but spatial arrangement information is lost
Solution Approach 1:
The tissue section is divided into multiple discrete regions of interest (ROIs), with each ROI assigned a unique barcode. This segmentation allows parallel processing of multiple regions while preserving their spatial identities through the barcode system.
Solution Approach 2:
Spatial information is copied from the physical tissue arrangement into a digital barcode format. Each ROI's spatial position is represented by a unique nucleic acid barcode that can be sequenced and analyzed computationally, preserving spatial relationships without requiring physical spatial maintenance during sequencing.
2Measurement precision
If smFISH techniques are used, then spatial resolution is improved, but throughput and scalability are limited
Solution Approach 1:
The method merges the spatial resolution capability of smFISH with the high-throughput capability of next-generation sequencing. By combining barcode-based spatial labeling with bulk RNA extraction and sequencing, the system achieves both precise spatial mapping and large-scale data collection.
Solution Approach 2:
The nucleic acid barcode system serves multiple functions: it provides spatial identification, enables high-throughput sequencing compatibility, and allows for multiplexed region analysis. This universal approach replaces multiple specialized techniques with a single integrated method.
3Measurement precision
If microdissection methods are used, then spatial definition is improved, but physical separation requirements and throughput are worsened
Solution Approach 1:
The method replaces mechanical physical separation (microdissection) with a chemical/optical labeling system. Instead of physically cutting and separating tissue regions, the system uses photolabile protecting groups that can be selectively removed with light to expose barcode sequences in specific spatial regions, eliminating the need for complex physical manipulation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Provides high-throughput labeling that preserves spatial organization of cells, allowing for accurate sequencing and analysis of spatially differential gene expression.
Implementation Method 1
exposing a first portion of the plurality of cells to photonic energy to activate the at least one photo-controlled adapter sequence within the first portion of the plurality of cells
Data Source
AI summary
Methods of labeling or barcoding molecules within one or more portions of a plurality of cells are provided. Kits and systems for labeling or barcoding molecules within one or more portions of a plurality of cells are also provided. The methods, kits, and systems may utilize photo-controlled adapter sequences, nucleic acids tags, and/or linkers.